Introductions of infrared optical material elements

Infrared optical materials are the components used to prepare lenses, prisms, windows, filters, and other items. Infrared optical materials mainly include semiconductor materials and dielectric materials (mainly alkali halide compounds, oxides, and some inorganic salts). According to their composition and morphology, they can be divided into five categories: crystal, hot-pressed polycrystalline, transparent ceramics, glass, and plastic; According to the transmission band, they can be divided into two categories: medium wave infrared optical materials and long wave infrared optical materials.

The medium wave infrared optical materials basically cover the short wave and medium wave atmospheric windows, while the long wave infrared optical materials basically cover the long wave atmospheric windows. The infrared radiation of objects near room temperature is mainly in the 8~12 band. Therefore, the infrared optical materials suitable for this band, namely the long-wave infrared optical materials, have important application value. Long-wave infrared optical materials are mostly semiconductor materials, and their forms are generally crystal, hot-pressed polycrystalline, or glass. At present, the commonly used long-wave infrared optical materials mainly include group IV semiconductor materials, Ge, etc.

Here is the content list:

●Characteristics of infrared optical materials

●Common infrared optical materials

Characteristics of infrared optical materials

1. Infrared materials are not only limited in variety but also expensive (usually in the range of thousands to tens of thousands of yuan per kilogram).

2. The temperature coefficient of the refractive index of some materials is large, resulting in a large drift of focal length with temperature. If the operating temperature range is wide, the infrared optical material must be correctly selected or necessary measures must be taken to compensate.

3. Some optical materials are fragile, with poor chemical stability, difficult processing and installation, and low yield.

4. Many optical materials are opaque and display different colors according to different materials and wave bands.

5. When infrared optical materials are heated, they will radiate by themselves, thus forming stray light.

Common infrared optical materials

Calcium fluoride can be used to make infrared optical prism, lenses, large aperture lenses, windows, and other optical elements. It can eliminate the secondary spectrum and is beneficial to the spectral segment achromatic, but its price and processing cost are slightly expensive.

Calcium fluoride can be used to make infrared optical prism, lenses, large aperture lenses, windows, and other optical elements. It can eliminate the secondary spectrum and is beneficial to the spectral segment achromatic, but its price and processing cost are slightly expensive.

Germanium is one of the most commonly used infrared materials, which can be used in both the long-wave infrared band and the medium-wave infrared band. The designer selects single crystal germanium material. Germanium can be processed by diamond turning, but due to its strong brittleness, it is easy to become debris, so it needs to be treated carefully in the process of optical processing, coating, and assembly. Due to the wide range of use of germanium elements, compared with its advantages, these shortcomings have become solvable problems.

The company specializes in producing customizable optical lenses, including infrared lenses, night vision objective lenses, and more. These lenses are designed for applications such as thermal imagers, infrared sights, night vision devices, infrared cameras, and drone monitors.

Nanjing Rising Opto-Electronic Co., Ltd is mainly engaged in infrared lenses, laser lenses, etc., and is recognized as the leader in high-performance infrared optical equipment in China. Our company has professional production equipment and an authoritative technical team. Our customers are all over the world and have been widely recognized by customers during the cooperation. Before the product leaves the factory, we will carry out strict quality tests to ensure the quality of the product. If you want to know more information about infrared optical materials, welcome to consult us. Our website is www.risingoptic.com.